After two devastating winter losses, here we go again ...
This photo was taken at the tail end of a hive inspection - here, I am inspecting a piece of burr comb I removed from the hive to see if there are any eggs (or worse, a queen bee) on it.
"Burr comb" is extra comb the bees build inside the hive. It's important to remove it regularly so they don't impede your ability to move/remove frames from the hive and to keep things neat and orderly. :)